Author/Authors :
Uesaka، نويسنده , , Mitsuru and Kinoshita، نويسنده , , Kenichi and Watanabe، نويسنده , , Takahiro and Ueda، نويسنده , , Toru and Yoshii، نويسنده , , Koji and Harano، نويسنده , , Hideki and Nakajima، نويسنده , , Kazuhisa and Ogata، نويسنده , , Atsushi and Sakai، نويسنده , , Fumio and Kotaki، نويسنده , , Hideyuki and Kando، نويسنده , , Masaki and Dewa، نويسنده , , Hideki and Kondo، نويسنده , , Shuji and Shibata، نويسنده , , Yukio and Ishi، نويسنده , , Kimihiro and Ikezawa، نويسنده , , Mikio، نويسنده ,
Abstract :
One of the S-band twin linacs (18L linac) of Nuclear Engineering Research Laboratory of University of Tokyo is modified in order to produce femtosecond electron single bunch for femtosecond X-ray generation via Thomson backward scattering, namely laser synchrotron radiation. Laser photocathode RF gun and chicane-type magnetic pulse compressor are installed at the S-band linac. 10 ps (FWHM) laser pulse generates 5 MeV, 10 ps (FWHM), 1 nC electron single bunch, which is accelerated up to 20 MeV in the S-band accelerating tube and compressed to 200 fs (FWHM) by the chicane. Design study has been performed by using the code of PARMELA and the installation has been finished. For precise and reliable measurement of the compressed pulse length, the comparison of measurement between the femtosecond streak camera and coherent transition radiation interferometry was carried out. Good agreement between them for 1–10 ps (FWHM) pulses was achieved. A new Michelson interferometer for the 200 fs pulse is now under construction.
